Improvement in sewer-traps



w. F. DOWNEY.

Sewer-Trap.

lio-.201.26m Patented Aug. 20, 1,818..

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y? wl and District of Columbia, have invented certion of a valve forpreventing the inowing for permitting of the free ventilation of thevalve with reference to its seat, whereby the vision be made against theinowing of water UNITED STATES PATENT OFFICE.

' lMPR'ovEMEN'rfIN SEWER-Temas.

` Specification forming part ofv Letters Patent No. 2

07,260, dated August :20, 1878; application 'filed I July 23, 1878.

To all 'whom it may concer-n ,Be it lgnown that I, WILLIAM F. DowNEY, of,Washingtom in the county of Washington tain new and useful'Improvements in Sewer- Traps; and I d'0 hereby declare that thefollowingis a full, clear, and exact description thereof, which will enableothers skilled in the art to which ,it 'appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof referncemarked thereon, which form a part of this spec-ication.Thisinvent-ion relates to improvements made on the sewer-trapsl patentedby me on the 13th of February, 187 7, December 4, 1877, and March 26,1878; and it consists in a novelconstrucef water throu'ghithedischargeoriiic'e"a'n`dtl`1e'Y mjurious effects which resulttherefromyand chamber of the valve; Vand it further consists in anovel'l method of adjusting a swinging valve, when in its normalposition, is` partially open for `the purpose of ventilation, but isheld in such a position as to be readily closed upon the entrance to itscase of backwater and the invention further consists in 'certaincombinations which will be morefully explained hereinafter. `Intheannexed drawings, which make apart of this specification, Figure 1 is alsectiral elevation of a trap embodying my improvei ments, and showing itas combined with a valve of peculiar construction; and Fig. 2 is anelevation ofthe valve and induction-pipe, showing themechanism foradjusting the valve with reference to its seat.

Correspondingl letters denote like parts both figures.

In valves of this type it is important that provision be made for sealing them against the passage of sewer `or other noxious gases, and forallowing such gases from the trap or pipe outside of the point where thevalve. or other seal. is applied. It is also important that prothroughthe eduction-oriiice or pipe, and for flushing the trap by thewater fromthe roof for the ventilation of the chamber of the trap l tion of whichserves las a chamber for water, r

which acts as a seal against the passage of gases. Near theoutlet-oriiice there is formed a nozzle, B, to which a pipe is attached,which may lead to a flue in a chimney, or it may cxtend up through theroof of the building, and thus convey away 'any gas which may enter thetrap. The opposite end ofthe trap, when in use, is made to assume avertical or' nearly vertical position, and is provided with a noz zle,C, tol which a'bra'nchpi'pe, vrD, is fixed. `The branch D' of this pipeis to be connected to the eaves-trough of the building, or to areservojir ot water in the upper part thereof, in

order that the trap may be flushed by the water whichV accumulates inthe trough from falling rain, or is taken from the reservoir at times.This branch may also be connected to the sewerage-pipes leadin g fromwater-closets, wash-basns,or sinks in the upper stories of any buildingin which the trap is placed, so that in the event of water caused by arise in rivers or streams, or from any other source, being made to flowinto the outlet-orifice, and thus prevent the water from theinductionlpipe from lowi aged', the water or other substances from theupper stories of the building, owiu(r to its greater head or force, willpass 4through the trap.l y

The branch D2 is for the purpose of admitting airA to the chamberv E inthe trap, and through it. to induction pipe or pipes, and thusthoroughly ventilating them. This vertical end of the trap is providedwith a cap, F, which is properly secured thereto, and maybe removed forthe vlpurpose of giving access to the interior, and to a valve placedtherein, for

the purpose' of preventing the inilow of water to the pipes with whichthe trap is connected. Upon one side 'of the enlarged portion of thecase of the trap there is formed a nozzle, Gr, in which there is anopening for the recepof the building in which it: may be placed, and

tion of an inductionpipe,H, which is made to 2 senseo is hinged theretoit will be caused by its own` gravity to remain 'partially open, andthus leave` a free passage for the air which enters the chamber E topass through, and thus ven tilate said chamber and the induction-pipes.

For the purpose of preventing corrosion of the valve-seat, there issecured to the inner end of pipe H a non-corrosive ring of metal, H',the inner surface of which forms the valveseat, it being of the formshown, or of any' other that will best insure the formation of a tightjoint with the valve.

For the purpose of closingl the end of the induction-pipe H at times,and in places where vthere is liable to be a back-pressure of water oran iniiow through the discharge-orlce of the trap, there is attached tothe inner end of such pipe a swinging valve, I, which is preferablyofthe semicircular form shown, but

which may be of any other form that will cause itto form a tight jointwith its seat when closed by back-pressure, but which will allow it tovremain partially open when not subjectedto suchpressure. This valve ismade of a semi-spherical form, and, by preference, of sheet metal, sothat it may 'be made to more readily close upon it-sy seat in the eventof an influx of watervthrough the eductionforiice, that portion thereof'which comes in contact with its seat having a flat unbroken surface,which is to be covered with a hoodl I1, of rubber or other elasticsubstance, for forming the joint with the seat, said hood to be held inp osition by wire I2, which passes around the valve in front of aprojection, I5, formed there on. For the purpose of arranging this valvewith reference to its seat, and so that it may be readily removed forrepairs, ythere is vattached to the pipe H a projection, K, which has anaperture formed in it for the reception of an. adjustable hinge, K1,.one portion of which passes through the projection K, the other beingsecured'to the valve.

K2 is a thumb-screw for holding the adjustable hinge in position in theprojection K.

For facilitating the swinging movement of the valve, there is attachedtoits inner surface an arm, I3, which carries a weight, I4, the latter.being attached to the arm by means of a screw formed thereon, by whichthe weight is rendered adjustable, so that it may be more or lesseffectual in holding the valve in its open position, and also inpreventing it from being raised up or carried into a more open positionin the event of an inilow of water throughvthe eductionoricc.

Having thus described my invention, what Iclaim, and desire to secure byLetters Patent, is-

1. The swinging valve, when made adjustable with reference to its seatby means of a. sliding hingc, constructed substantially as described.

2. The combination of the swinging semispherical valve having aprojecting flange for holding its facing, an elastic face, and a ringfor securing said facing to' the valve, substan tially as set forth.

3. In combination with -the induction-pipe of a water or stench trap,having upon it a valve-seat which recedes from its upper to its lowersurface, an adjustable swingingralve, substantially as and for thepurpose set forth.

4. The combination of the case A, the induction-pipe H, and theadjustable swinging valve I, the parts being arranged to operatesubstantially as set forth.

5. A case for a stench-trap, provided with an aperture for the escape ofgas ,outside ofthe vwater-seal, and with apertures for the reception ofinlet and outlet'pipes, and an air-pipe for Ventilating saidcase,substantially as set forth.

In testimony that I claim the foregoing as lmy own I affix my signaturein presence of two witnesses.

WM. F. DOWNEY.

Witnesses:

D. I. HOLLOWAY, A. T. MAUPIN.

